The classifications of houses of worship are taken from a combination
of sources, including the Newton Graphic, the Newton
Area Yellow Pages, and, for subcategories for Jewish congregations, the Jewish Advocate and Guide to Jewish Boston and New England (1986).
Corrections cheerfully accepted!

I invite those houses of
worship which have home pages to send me their URL, and I will be
happy to add a link. Send me mail bobbifox@newtoncitizens.com, and we'll arrange it!